It's National Coffee Day! Here's where you can get free joe

Dunkin' Donuts: Customers can get a free medium cup of Dunkin' Donuts hot or iced dark roast coffee, with a one-per guest limit at participating locations.

Cumberland Farms: Customers can text the word FREECOFFEE to 33733 using their smartphone to receive a coupon for a free hot or iced coffee, in any size, all day long. The coupon must be redeemed on National Coffee Day, Sept. 29.

Peet's Coffee & Tea: Free small cup of Peet's Major Dickason Blend with any purchase of a baked good, oatmeal or fresh food item.

Panera Bread: Rewards members have been able to score a free coffee every day of September, so that deal will still be in place for National Coffee Day.

Wawa: Free coffee in the size of your choice.

Krispy Kreme: Customers can get a free small coffee (12 o.z.) and a free original glazed donut. Krispy Kreme awards members get double points with purchase on Tuesday when you purchase any coffee drink.

Tim Hortons: Get any size coffee in Regular or Dark Roast for just $1 at participating U.S. restaurants.

McDonald's: Participating McDonald's restaurants in Connecticut and Western Massachusetts are giving out free small coffees, so it's worth calling your local restaurant to check if they're offering a similar deal.

Sheetz: Free Kick in the Beans coffee at Sheetz locations in Pennsylvania, Virginia, West Virginia, Maryland, Ohio and North Carolina.

Coffee Bean & Tea Leaf: Iced coffee, flavored iced coffee and iced Americanos for half off all sizes all day at participating locations. Iced, because this is Southern California we're talking about.

Maui-Wowi: Customers shopping online can get 50% off with the coupon code ALOHACOFFEE. It's not immediate coffee in your mouth, but it is a discount.

Caribou Coffee: Instead of giving people free coffee, for every cup of Amy's Blend coffee purchased on Sept. 29, Caribou will donate a cup of coffee to nurses and families in cancer centers throughout the country.